<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="loginOut">退出</el-button>
    </el-header>

    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>

        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>

            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>

      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: "Home",
  data() {
    return {
      menuList: [],
      iconsObj: {
        "125": "iconfont icon-user",
        "103": "iconfont icon-tijikongjian",
        "101": "iconfont icon-shangpin",
        "102": "iconfont icon-danju",
        "145": "iconfont icon-baobiao",
      },
      isCollapse: false,
      activePath: "", // 被激活的链接地址
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    // 退出
    loginOut() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    // 获取左侧菜单数据
    async getMenuList() {
      const { data: res } = await this.$http.get("/menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
    },
    // 左侧菜单展开和折叠
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // 保存链接激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    },
  },
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;

  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    div {
      display: flex;
      align-items: center;
      img {
        width: 80px;
        height: 80px;
      }
      span {
        margin-left: 15px;
      }
    }
  }

  .el-aside {
    background-color: #333744;

    .toggle-button {
      background-color: #4a5064;
      text-align: center;
      font-size: 10px;
      line-height: 24px;
      color: #fff;
      letter-spacing: 0.2em;
      cursor: pointer;
    }

    .el-menu {
      border-right: none;
      .iconfont {
        margin-right: 10px;
      }
    }
  }

  .el-main {
    background-color: #eaedf1;
  }
}
</style>
